This is a phase 2 crossover, randomized, placebo-controlled, single-blind, repeat dose study in PBH subjects to determine the effect of mizagliflozin on adverse events and postprandial glucose excursions.

This is a phase 2 crossover, randomized, placebo-controlled, single-blind, repeat dose study in PBH subjects to determine the effect of mizagliflozin on adverse events and postprandial glucose excursions. This study will examine repeat doses of mizagliflozin and placebo while also evaluating dosing regimen. Up to 15 subjects are expected to complete the study. Subjects will be randomly assigned to a treatment arm within a cohort. Each subject should receive placebo and 2 active dose regimens in a crossover fashion.

Inclusion Criteria:

• Roux-en-Y gastric bypass surgery performed > 6 months prior to enrollment
• Diagnosis of PBH

Exclusion Criteria:

• History of current medical conditions (other than PBH) which may result in hypoglycemia such as insulinoma, adrenal insufficiency, insulin autoimmune hypoglycemia, congenital hyperinsulinemia.
• Current use of insulin or insulin secretagogues
• History of current fasting hypoglycemia
• Pregnancy and/or lactation: For women of childbearing potential: there is a requirement for a negative urine pregnancy test and for agreement to use contraception during the study and for at least 2 weeks after participating in the study